Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94675e1d9910a59…

MALICIOUS

PDF

75.0 KB Created: 2021-04-05 22:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dd8a90d7db52687b7c54fd8c195dee01 SHA-1: 2e10b8624ac21ff52d94a2ccb449803c445f2f84 SHA-256: d94675e1d9910a596619a12f7cdf136df05502a2e9eb84f184052645ce569195
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/award?keyword=analyzing+poetry+graphic+organizer+pdf PDF link annotation
    • https://cdn.sqhk.co/jasojime/hbjciea/kogama_parkour_27_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/hcxXhfd/diary_with_code_lock_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/iieQAgd/italian_songs_ringtones_download.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/fuwotura.pdfIn PDF document text
    • https://buzezofolo.weebly.com/uploads/1/3/5/9/135964700/4223403.pdfIn PDF document text
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/9d8d9203.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/ibmHige/ratit.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/qihjjhc/ruxodim.pdfIn PDF document text
    • http://evilcheats.fun/821951314265v5xn.pdfIn PDF document text
    • http://arevakar-travel.com/30533256079vgvlk.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/alfred_wegener_the_origin_of_continents_and_oceans.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/wjhBuHi/jididajuwaxabujukirobot.pdfIn PDF document text
    • http://finonit.mypressonline.com/where_do_babies_come_from_book_for_7_year_old.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/7839576.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/iHB6HOQ/dokezujuxom.pdfIn PDF document text
    • http://opros.xyz/blob_movie_online0bpgp.pdfIn PDF document text
    • http://menbp.online/how_to_make_a_time_capsule_containerugisl.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/tobajikaxetofasolusobend5en.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/free_audacity_with_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/3gfigjh/oware_vs_mancala.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/392359670.pdfIn PDF document text
    • https://lakaporizad.weebly.com/uploads/1/3/4/2/134234628/8386092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kodexogezetegir.epizy.com/kutokap.pdfIn PDF document text
    • http://pobavawekede.rf.gd/72657380326.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/a_textbook_of_botany_angiosperms_free_download.pdfIn PDF document text
    • http://purupuladufuba.rf.gd/alphabet_matching_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 5380 bytes
SHA-256: fd25a6025b8100259b3cfef90f1e2c4411022145b41681bc8494c1df9bfab25c
font_01_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 10636 bytes
SHA-256: 7a5ccdbaf721d8542a761e17c1b1f9154204edaa9796814fd9320c65fa1efe8b